Trolley circuit-former.



YATENTED MAY 7. 1907.

o. 852,969. G. R. LIVERGOOD.

TROLLEY CIRCUIT FORMER. 7 APPLICATION FILED JAN. 29, 1906;

N L N Witnesses; Inventor P/q/d L/upryo ad Attorney.

THE NORRIS PETERS ca, wasumm'un. n. c.

UNITED STATES PATENT @FFIQE.

TROLLEY ClRCUlT-FORMER.

Specification of Letters Patent.

Patented May '7, 1907.

Application filed January 29, 1906. Serial No. 298.508.

To all whom it may concern.-

Be it known that I, GERALD R. LIVER- GOOD, a citizen of the UnitedStates, residing at St. Joseph, in the county of Buchanan and State ofMissouri, have invented certain new and useful Improvements in TrolleyCircuit- Formers; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of thisspecification.

The object of my invention is to provide a mechanism to be used ontrolley systems that Will automatically close and open at fixed places alocal circuit on the car in connection with a street or stationindicator, and provide for back ups and to recover from same withoutclosing circuit a second time on second contact with same switchterminals.

I accomplish my object by the mechanism illustrated in the accompanyingdrawings, in

. which,

Figure 1 is a detail cross sectional top view of a terminal for atrolley pole showing a frame with clamp for holding the same inposition, a double finger wiper cam, a shaft, a twist spring in positionand a tube containing a thrust spring and plunger; Fig. 2 is an end viewof a terminal for a trolley hanger; Fig. 3 is a side view of a terminalfor a trolley hanger, and Fig. 4 is a side view of the completemechanism of the device showing a terminal clamped to a trolley poleabout to pass and contact with another terminal clamped into position ona trolley hanger.

The device consists of a containing frame A designed to fit the contourof trolley pole O and to be clamped thereto by clamps L L hinged to saidframe at M M. The other end of said clam s to be fastened to said frameby screw bolts Fl N, said frame and clamps to be insulated from saidpole.

B is a double wiper cam consisting of two fingers Y and Z at rightangles pivotally attached to frame A by shaft C having its terminals inbearings in said frame. D is a twist spring about shaft O having one endfastened to the frame at E, the other end fastened to cam B at F.

G is a tube closed at its outer end and fastened rigidly to frame A. His a plunger working in said tube. K is a slot in side of 'said plungerJa pin passing through said and keeping plunger H, normally, at itsfull-' est extension. The plunger may travel back and forth in said tubethe length of the slot in said plunger.

X is a terminal designed to fit between U and W of a trolley hanger andis provided with a hole X (Fig. 2) in top of said termina S S are legsprovided with notches T T adapted to engage and be held in position bypart of the trolley hanger.

R is a contact point of terminal X.

P and Q are cam faces at right angles on cam B.

Finger Y and face Z of finger Z are covcred with insulating material.

A is a wire attached to frame A and forming connection to the localcircuit in the car and thence to ground connections.

Ordinarily the circuit remains open but when the trolley passes theterminal on the hanger the cam B with finger Z wipes and forms contactwith point R of terminal X. In doing so cam B turns backward on shaft C,the spring D recovering said cam to its normal position after thetrolley passes terminal X. Should the trolley be backed past terminal Xthe point R would contact with insulated face Z of finger Z and theentire cam B would move and be thrown forward a quarter turn from itsnormal position by the action of thrust spring I on plunger H, saidplunger pushing against face P of cam B. The cam B would then remain inits new position until the trolley moved forward again when point Rwould contact with insulated finger Y and return cam B to its normalposition.

What I claim and desire ters Patent, is,

1. In a trolley circuit former the combination of a containing frame,clamps to hold same in position, a wire attached to containing block andadapted to be connected with a local circuit on a car, a cam havingduplicate wiper fingers at right angles one of said fingers insulated onits back face, the other entirely insulated, a shaft adapted topivotally attach said cam to the containing frame, a twist spring aboutsaid shaft one end of which is fastened to said cam, the other endfastened to secure by Letto the containing frame, a tube closed at itsouter end fastened rigidly to said frame, a plunger, provided with aslot in one side, adapted to fit in said tube, a pin adapted to passthrough said slot in the plunger and to have its ends fastened rigidlyin said tube, a thrust spring adapted to fit in said tube and tonormally hold said plunger to its fullest extension, cam faces at rightangles on said cam to be acted on by said plunger, a terminal provided,with a hole in top, duplicate legs provided with notches and a contactpoint, said terminal being adapted to be engaged by and clamped intoposition between the separate parts of a trolley hanger.

2. 1n a trolley circuit former the combination of a containing frame,clamps to hold the same in position, a wire attached to containing blockand adapted to be connected with a local circuit on a car, a cam havingduplicate wiper fingers at right angles one of said fingers insulated onits back face, the other entirely insulated, a shaft adapted topivotally attach said camto the containing frame, a twist spring aboutsaid shaft, one

end of which is fastened to said cam, the other end fastened to thecontaining frame, a tube closed at its outer end, fastened rigidly tosaid frame, a plunger provided with a slot in one side, adapted to fitin said tube, a

pin adapted to pass through said slot in said plunger its ends fastenedrigidly in said tube, a thrust'spring adapted to fit in said tube and tonormally hold said plunger to its fullest extension and the cam faces atright angles on said cam to be acted on by said plunger.

3. In a trolley circuit former, a terminal provided with a hole in itstop, duplicate legs provided with notches and a contact point, saidterminal being adapted to be engaged by and clamped into positionbetween the separate parts of a trolley hanger.

In testimony whereof, I affiX my signature, in presence of twowitnesses.

GERALD R. LrvERGooD.

Witnesses:

J H. CARGILL, H. A. SPRAGUE.

